Adjustable desk lamp



FIG. 1 is a perspective view of an adjustable desk lamp showing my new design;

FIG. 2 is a side elevational view thereof on an enlarged scale;

FIG. 3 is a front elevational view thereof on an enlarged scale;

FIG. 4 is a rear elevational view thereof on an enlarged scale;

FIG. 5 is a top plan view thereof on an enlarged scale;

FIG. 6 is a bottom plan view thereof on an enlarged scale;

FIG. 7 is a side elevational view of a second embodiment _of an adjustable desk lamp showing my new design;

FIG. 8 is a front elevational view of the second embodiment;

FIG. 9 is a rear elevational view of the second embodiment;

FIG. 10 is a top plan view of the second embodiment; and

FIG. 11 is a bottom plan view of the second embodiment. 

The ornamental design for an adjustable desk lamp, as shown and described. 